If you are performing a discrimination and noticing that the test is taking too long, there might be because:

  1. The false positives:
    • This is just an internal control.  You can find more information on the algorithm here.  The application comes with a number of internal controls to check the reliability of the listener's responses.  One of these controls is to send 2 equal signals.  If the listener responds that they are different, this is a false positive response.  The application takes thin into consideration in its underlying binomial statistics.
  2. The test didn't end:  
    • This is normal. The test goes on until it finds a threshold (or JND).  In case of less reliable responses, the algorithm needs more time to come to a conclusion.